All effects are in the free version available. Please define a selection for this. (Round buttons)
In the free version you can save in the m4a, wav and wma format.
Choose one of this formats in the filepicker.

Under Windows 10 desktop and tablet:
Open in the Windows Control Panel "Sound" and there choose the tab "Record". If there is no item "Stereomix" click right and choose "Show deactivated devices".
If the item "Stereomix" is visible aktivate it (Right click).
Set the Stereomix as statndard with a right click.
In some cases the installed audio driver has no Stereomix. You can search the original driver from your Sound card vendor.
Another solution is a software „Virtual Audio Cable“.

1. Please activate unter Windows Settings/Privacy/Microfone the Lexis Audio Editor.
2. Under Windows x86 at least one audio input driver should be installed.
To verify this open in the Windows Control Panel "Sound" and there choose the tab "Record".